Stranding machine for the manufacture of wire ropes free from twist



v. Film-H STRANDING MACHINE FOR THE MANUFACTURE OF WIRE ROPES FREE FROMTWIST Filed Dec. 9, 1926 2 Sheets-Sheet .Aug. 12, 1930. VFURTH 1,773,038

STRANDING MACHINE FOR THE MANUFACTURE OF WIRE ROPES FREEFROM TWIST FiledDec. 9, 1926 2 Sheets-Sheet 2' IN V EN TOR.

mm BY vmw/ A TTORNEYS.

Patented Aug. 12, 1930.

: UNITED srA'n-zs PATENT 'QFFICE,

VICTOR F'U'RTH, OF OOLOGNE-MUL EEIM, GERMANY, ASSIGNOR TO FEII'IEN &GUILLE- AUME GARLSWERK ACTIEN-GESELLSCHAFT, OF COLOGNE-MULHEIM, GERMANY.

STRANDING- MACHINE FOR THE MANUFACTURE OF WIRE ROPES FROM TWISTApplication filed December 9, 1926, Serial No. 153,679, and in GermanyMay 31, 1926.

In braiding 'or laying the wires to fbrm strands or ropes, the wires arebent into a. helical shape. This laying is however not able to do awaywith the resilience in the wire to such anextent that the helically bentwire will no longer spring back. In order to prevent or counteract thisspringing back it has already been proposed to pass the wires, beforethey are braided or laid, through a former, which imparts to them thehelical line or pitch they are to occupy in the fin ished strand or inthe rope. In this former the wires are bent in such a manner that theyno longer have a tendency to spring back.

It has been proposed, among'other suggestions, to use a tapered drum asthe former,

consisting of independently movable tapered sections on which grooveddiscs or rollers are mounted, over and under which the wires are passed,so that, when the drums revolve, they are bent into -a helical shape.This arrangement however, is complicated, inconvenient and costly and nomeans are provided for preventing the. helically bent wires fromtwisting about their own axes, when the drums revolve and of therebypreventing the occurrence'of internal strains in the wires.

The invention is clearly illustrated in the accompanying drawing, inwhich Fig. 1 is enlarged of the improved roller forming device, and

Fig. 2 is a diagrammatic view of, the device with prebendingmeans inconnection 6. These arms are preferably inclined to-" wards thestranding point'according to the direction of the wiresd coming from thereels '0 so that the feeding of the wires can take place through thehollow shaft towards the preshaping Soint without any deflecting of thewire. 11 the supporting arms 6 side elevational detail These grooveddiscs or rollers 0 are mounted in such-a manner that the wires passingthrough between them are bent into a helical shape during the operationof the stranding machine. In order to be able to adjust the rollersaccording to the thickness of the wires used or the desired helical formor pitch, the rollers 0 may be so arranged on the supporting arms thatthey can be adjusted in their longitudinal direction or at. right anglesthereto. Preferably the two outer rollers of each supporting arm aremade adjustable in the longitudinal direction as shown in dotted linesof Fig. 1 and only the middle roller is made adjustable at right anglesto the said longi-- tudinal direction. Owing to the required pullingforces being small, the wires which are prebent by means of this deviceare not damaged or subjected to any preliminary stresses and they retainthe helical form imparted to them corresponding to the pitch of thefinished rope also on' the portion from the prebending point up to thestranding As soon as the wires leave the-rollers point. 0 theyimmediately drop, owing to their h lical form, into the shape of therope is around i the rope core 9 of hemp orwire'. For efii'ecting thelaying of the wires the laying frame a and with it the bobbinscontaining the wires are revolved about the axis of the rope or the coreg. In braiding and laying machines in order to prevent a twisting of thepreliminarily' bent wires about their own axes,

the bobbins in the laying-frame are given the usual reverse rotarymotion, so that they always retain their initial position in space andthe wires will not be twisted. Wire ropes made in this manner from wireswhich ihavebeen preliminarily bent so as to be free from strainare'completely free from the tendency to untwist, in otherwords, thelaid wires have no tendency to turn in the reverse direction, do notspring out, and the finished rope will not warp and will not formkinks.-

Fig; 2 shows the arrangement of the roller prebending. device 'll in thestranding machine, the wire reels 0 of which through the intermediaryofa transmission gear w during the operation of the stranding machinereceive a twist such that the reels always retain the vertical positionshown, so that by this reverse rotary motion an axial twisting of theprebent wi'res is avoided during strand- 1, A device for the manufactureof wire ropes free from twistin in which the prebending of thewires is.e ected between rollers, comprising in combination with the roll-' m ersand with a strandin head having discs, supporting arms for t c saidrollers and means for detachably and rigidly securing the saidsupporting arms onto the front disc ofthe stranding head, the saidsupporting arms I I having hollow shafts through which the wires can befed to the rollers.

2. A device as claimed in claim 1 in which the supporting arms are soinclined towards the stranding point that the center lines of m thesupporting arms lie on the periphery of a cone, the axis. of whichcoincides with the strandin axis. y

' 3; A eirice as claimed in claim 1 having reels on the stranding headca able of reverse a rotation for the purpose 0 preventing a twisting ofthe prebent wires.

4. A device for manufacturing'wire ropes free from a'tendency :tountwist as claimed in claim '1, and in which the rollersare' ar- 30ranged so'as to be ca able of adjustment.

5. A device fort e manufacture of wire ropes free from a tendency tountwist as claimed in claim 1, and in which the outer rollers areadjustable 'in the longitudinal direction of the supporting'arms.

6. A device for manufacturing wire r0 s free from a tendency to untwistas claime in claim 1, and in which the central rollers are adjustable atright angles with respect to the T longitudinal direction of thesupporting' arms. 1 In testimony whereof I have signed my nametothisspecification.

